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ColorfulClouds vs wttr.in

Same instrument, two spec sheets — measured, not claimed.

APIColorfulCloudsON SCHEDULE—wttr.inNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished (informal per-IP throttling)
In directory since2026-07-052026-07-05
operationalpartialdownno data

ColorfulClouds vs wttr.in: common questions

Which is more reliable, ColorfulClouds or wttr.in?

Only wttr.in is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do ColorfulClouds and wttr.in need an API key?

wttr.in needs no key, while ColorfulClouds requires a free API key. If you want to start calling without signup, reach for wttr.in first.

Can I call ColorfulClouds and wttr.in from the browser?

Only wttr.in is browser-friendly — it returns CORS headers over HTTPS. ColorfulClouds needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ColorfulClouds and wttr.in free for commercial use?

ColorfulClouds has unclear commercial terms, and wttr.in has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.